how insert data in table

modified ur code like,

protected void ImageButton2_Click1(object sender, ImageClickEventArgs e)
   {
       string data = Server.UrlDecode(Request.QueryString["BehCode3"]);
      
       
 
       string price = RadioButton2.Checked ? TextBox1.Text : "noprice";
       SqlCommand _cmd = new SqlCommand("insertproduct", _cn);
       _cmd.CommandType = CommandType.StoredProcedure;
       _cn.Open();
 
       _cmd.Parameters.AddWithValue("@Name", txtname.Text);
       _cmd.Parameters.AddWithValue("@Model", txtmodel.Text);
       _cmd.Parameters.AddWithValue("@Description", CKEditorControl1.Text);
       _cmd.Parameters.AddWithValue("@Price", price);
 
       _cmd.Parameters.AddWithValue("@Classification", DDL1.SelectedItem.Text);
       _cmd.Parameters.AddWithValue("@subset", DDL1.SelectedItem.Text);
       _cmd.Parameters.AddWithValue("@behcode", data);
 _cmd.Parameters.AddWithValue("@id",Convert.ToInt32(ViewState["Id"]));  
  Int ID = Convert.ToInt32(_cmd.ExecuteScalar());
    If(ID>0)
{
       ViewState["Id"]= ID.ToString(); 
}
       _cn.Close();
       Response.Redirect(Request.Url.AbsoluteUri);
   }

protected void BtnUpload1_Click(object sender, EventArgs e)
  {
  
      string path = Server.MapPath(".") + "\\../image/House\\";
  
      string[] validext = { ".jpg", ".gif", ".png", ".rar" };
      string ext =
          System.IO.Path.GetExtension(AsyncFileUpload1.PostedFile.FileName);
      if (Array.IndexOf(validext, ext.ToLower()) < 0)
      {
          lblMessage.Text = "please enter correct format";
          return;
      }
  
  
      string filename = System.IO.Path.GetFileName(fup1.PostedFile.FileName);
  
  
      while (System.IO.File.Exists(path + "\\" + filename))
          filename = "1" + filename;
  
       
  
  
      if (fup1.HasFile)
      {
          try
          {
     
              if (fup1.PostedFile.ContentLength < 105000)
              {
                
                  fup1.PostedFile.SaveAs(Server.MapPath("~/Upload") + System.IO.Path.DirectorySeparatorChar + AsyncFileUpload1.PostedFile.FileName);
  
                    
                  Label20.Text = "File " + fup1.PostedFile.FileName + " uploaded successfully.";
              }
              else
              {
                    
                  Label20.Text = "File size of " + Convert.ToString(fup1.PostedFile.ContentLength / 1024) + " KB is exceeding the uploading limit.";
              }
          }
          catch (Exception ex)
          {
              // error message
              Label20.Text = "Some problem occurred while uploading the file. Please try after some time.";
          }
      }
      else
      {
          // warning message
          Label20.Text = "Please choose a file to upload.";
      }
  
      fup1.PostedFile.SaveAs(path + filename);
  
      SqlCommand _cmd = new SqlCommand("Fileup4", _cn);
      _cmd.CommandType = CommandType.StoredProcedure;
      string data = Server.UrlDecode(Request.QueryString["BehCode3"]);
  
      _cn.Open();
      _cmd.Parameters.AddWithValue("@image2", fup1.FileBytes);
      _cmd.Parameters.AddWithValue("@Behcode", data);
 	_cmd.Parameters.AddWithValue("@id", Convert.ToInt32(ViewState["Id"]));
          Int ID = Convert.ToInt32(_cmd.ExecuteScalar());
    If(ID>0)
{
       ViewState["Id"]= ID.ToString(); 
}
      _cn.Close();  
  
  
  }

then do following modification in ur sp,

alter procedure [dbo].[Fileup1] 
@image varbinary(MAX), 
@behcode nvarchar(10),
@id int = 0
AS 
BEGIN 
IF @id > 0 AND EXISTS(SELECT behcode FROM House_p WHERE iD = @id)
BEGIN
UPDATE House_p
SET [Image] =@image,
behcode = @behcode
WHERE iD = @id 
SELECT @id
END
ELSE
BEGIN
insert into House_p ([Image],behcode)values (@image,@behcode)
SELECT SCOPE_IDENTITY()
END
END

alter procedure [dbo].[Fileup3] 
@image1 varbinary(MAX), 
@behcode nvarchar(10),
@id int = 0
AS 
BEGIN 
IF @id > 0 AND EXISTS(SELECT behcode FROM House_p WHERE iD = @id)
BEGIN
UPDATE House_p
SET Image1 =@image1,
behcode = @behcode
WHERE iD = @id 
SELECT @id
END
ELSE
BEGIN
insert into House_p (Image1,behcode)values (@image1,@behcode)
SELECT SCOPE_IDENTITY()
END
END

ALTER procedure [dbo].[insertproduct]
@Name nvarchar(30),
@Model nvarchar(30)
,@Behcode nvarchar(10)
,@price nvarchar(30)
,@Classification  nvarchar(30)
,@Description nvarchar(max)
,@subset nvarchar(30)
,@id int =0
AS BEGIN
Declare @H_name nvarchar(30) set @H_name =(select H_name from House_info where behcode=@Behcode )
IF @id > 0 AND EXISTS(SELECT behcode FROM House_p WHERE iD = @id)
BEGIN
UPDATE House_p
SET Name=@Name
,Model=@Model
,Description=@Description
,Price=@price
,Classification=@Classification
,subset=@subset
,Date=GETDATE()
,H_name=@H_name
WHERE BehCode=@Behcode and ID=@id
SELECT @id
END
ELSE
BEGIN
INSERT INTO House_p(
Name,Model,Price,Classification,subset,[Date],H_name,BehCode)
VALUES(
@Name,@Model,@price,@Classification ,@subset ,GETDATE(),@H_name,@Behcode)
SELECT SCOPE_IDENTITY()
END
END

and use my previous reply code  to set id in view state